I recently visited Walt Disney World and Universal Orlando. I stayed on-site at both locations, and the comparison was jarring. At Walt Disney World, I could get into my hotel room, the various parks, use FP+, get photos, and make purchases, all with the same band around my wrist. In some of the rides, there were customised responses, like a name flashing on a screen, which adds to the magic. I thoroughly enjoyed the MagicBand process during that trip.
When we moved to Universal Orlando, I was given a booklet (we needed a backpack to carry it around) full of pieces of paper. It had room keys, theme park tickets, Universal Express passes, Universal CityWalk passes, parade passes, photo passes, dining passes (a separate piece of paper for each person, for each meal).
In a single day at the parks, we needed either 1 MagicBand per person, or about 8 pieces of paper per person. And when it rained during our trip, we occasionally had to get some of those pieces of paper reprinted.
I understand there's an aversion to the FastPass+ system and the MagicBand system too, but if Disneyland could institute an option of MagicBand or RFID Card (which could go into one's wallet or purse), that would be fantastic for the local residents, since they'd have their card in their wallets throughout the year, and the travellers.
We also had someone who had to make use of the Disability Access Service at Walt Disney World, and Attraction Assistance Pass at Universal Orlando. Disney was able to load an extra FP+ onto the MagicBands. Universal had to fill out a form.